Need help with moving files from a folder to a subfolder

So I have a folder and that folder has a lot of folders, each of these folders has files named as "01.png" ~ "22.png", example:
Main folder pic, with lots of folders

Inside of each folder

I want to it look to something like
Main folder
Is it possible?
Main folder pic, with lots of folders

Inside of each folder

I want to it look to something like
Main folder
- Folder 1
- create this subfolder ch01 (pngs files)
- create this subfolder ch01 (pngs files)
Is it possible?